RANKING · 2000 CENSUS · 63 SHOWN OF 63

Oldest by median age, Colorado counties · 2000

Colorado counties ranked by median age of residents (2000 ACS). This list covers the 63 counties in Colorado that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 1990

01Mineral County, COCO91045.0+20%

02Custer County, COCO5,59044.9+14%

03Hinsdale County, COCO75343.9+13%

04San Juan County, COCO81343.7+30%

05Ouray County, COCO5,26543.4+9%

06Sedgwick County, COCO2,24743.2+6%

07Baca County, COCO3,34742.9+10%

08Dolores County, COCO2,46642.4+16%

09Delta County, COCO32,17842.3+3%

10Costilla County, COCO3,67942.1+19%

11Chaffee County, COCO20,83141.8+12%

12Huerfano County, COCO7,01141.7+6%

13Las Animas County, COCO14,39140.9+8%

14Archuleta County, COCO14,30640.8+15%

15Jackson County, COCO1,21140.5+14%

16Clear Creek County, COCO8,99440.2+12%

17Washington County, COCO4,73240.2+8%

18Park County, COCO18,31440.0+12%

19Phillips County, COCO4,42039.8+3%

20Kiowa County, COCO1,41239.7+7%

21Teller County, COCO24,75639.4+14%

22Montrose County, COCO44,59138.8+4%

23Fremont County, COCO50,03938.8+3%

24Pitkin County, COCO16,62538.4+10%

25Gilpin County, COCO6,07338.3+6%

26Mesa County, COCO162,84538.1+10%

27Montezuma County, COCO26,67838.0+13%

28Cheyenne County, COCO1,71337.9+19%

29Lincoln County, COCO5,64537.8+3%

30Otero County, COCO17,68337.7+8%

31Rio Blanco County, COCO6,68337.5+16%

32Kit Carson County, COCO7,06937.4+7%

33Bent County, COCO5,71637.3−9%

34Rio Grande County, COCO11,08737.3+10%

35Yuma County, COCO9,89637.3+4%

36Elbert County, COCO30,53437.2+11%

37Grand County, COCO16,49636.9+11%

38Saguache County, COCO6,73236.9+17%

39Jefferson County, COCO580,45136.8+10%

40Pueblo County, COCO169,27736.7+6%

41Crowley County, COCO5,67736.6+7%

42Logan County, COCO20,65436.5+5%

43La Plata County, COCO56,89835.6+12%

44Moffat County, COCO13,12235.4+11%

45Routt County, COCO25,32935.0+8%

46Arapahoe County, COCO673,82034.5+6%

47Conejos County, COCO7,52934.2+9%

48Garfield County, COCO63,47434.2+4%

49San Miguel County, COCO7,75334.2+3%

50Douglas County, COCO399,39633.7+4%

51Morgan County, COCO30,30633.5+3%

52Boulder County, COCO328,56033.4+6%

53Larimer County, COCO377,29233.2+6%

54Denver County, COCO740,61333.1−3%

55El Paso County, COCO757,04033.0+9%

56Prowers County, COCO11,88432.4+1%

57Adams County, COCO554,66831.4+2%

58Eagle County, COCO54,29131.2+2%

59Weld County, COCO378,42630.9+1%

60Summit County, COCO31,51730.8−0%

61Alamosa County, COCO16,68830.6+8%

62Lake County, COCO7,55230.5−2%

63Gunnison County, COCO17,43930.4+7%

SHOWING 1–63 OF 63

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS